Ecosystems Test Review

What is the purpose of a dichotomous key?

• to find a common ancestor
• to show the evolution of organisms
• to show relationships between organisms
• to identify organisms

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?

• Juniper
• Pine
• Spruce
• Fir

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

• Coleoptera

• Heteroptera

• Diptera

• Lepidoptera

What step do we always start with when using dichotomous keys?

• 1
• 2
• 3
• 4

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta
• Order Amblygygi
• Order Araneae
• Order Scorpiones

Tags

NGSS.MS-LS4-2

How much energy is passed from each trophic level to the one above it?

• 100%

• 10%

• 1%

• 90%

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which of the following is an example of a population?

• 30 bears living all over the United States

• 50 barn owls and 15 mice living in a field

• 154 trout living in a lake

• All of the animals and plants in North America

Tags

NGSS.MS-LS4-4

Which organisms provide the important link from dead organic matter to matter from the environment?

• autotrophs

• decomposers

• parasites

• photosynthesizers

Which event is the best example of competition between species in a pond?

• dragonflies landing on lily pads
• lizards and snakes lying in the sun
• hawks eating mice
• frogs and toads eating flies

Tags

NGSS.MS-LS2-2

Birds eat insects off the skin of cows. If the relationship is a type of mutualism, then the organisms that will benefit are

• only the cattle

• neither the birds or the cattle

• both the birds and the cattle

• only the birds

Tags

NGSS.MS-LS2-2